/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.polardbx.optimizer.variable;

import com.google.common.collect.ImmutableMap;
import com.alibaba.polardbx.optimizer.biv.MockUtils;

import java.util.concurrent.atomic.AtomicLong;

/**
 * @author dylan
 */
public class MockVariableManager extends VariableManager {

    public MockVariableManager(String schemaName) {
        super(schemaName, null, null);
    }

    @Override
    protected void doInit() {
        sessionVariablesCache = ImmutableMap.<String, Object>builder().put("sql_mode", "STRICT_ALL_TABLES").build();
        globalVariablesCache = ImmutableMap.<String, Object>builder().put("sql_mode", "STRICT_ALL_TABLES").build();
        lastSwapTime = new AtomicLong(System.nanoTime());
    }

    @Override
    Object getVariable(String key, ImmutableMap<String, Object> m) {
        if (key == null) {
            return null;
        }
        if (m.containsKey(key)) {
            return m.get(key);
        }
        return MockUtils.mockVariable(key);
    }
}
